To find the circumference of a circle when you have the diameter, you can use the formula C = 2πr, where:
- C represents the circumference of the circle,
- π (Pi) is approximately 3.14 or 22/7,
- r is the radius of the circle.
Since the diameter is given as 28 inches, you first need to find the radius. The radius is half of the diameter:
r = diameter / 2 = 28 inches / 2 = 14 inches
Now that we have the radius, we can plug it into the formula to find the circumference:
C = 2πr
C = 2 × π × 14 inches
Calculating this gives:
C = 28π inches
Using the value of π as approximately 3.14, we can finalize the calculation:
C ≈ 28 × 3.14 ≈ 87.92 inches
Thus, the circumference of a circle with a diameter of 28 inches is approximately 87.92 inches.